Size tolerance, surface roughness, geometric tolerance and material requirements are supposed to be contained in technical requirements.
技术要求应包括尺寸公差，表面粗糙度，形位公差，材料等要求。
Workpiece surface roughness is an important technical index in evaluating the ground quality of belt grinding.
砂带磨削中，表面粗糙度是被磨工件表面质量的一个重要的技术指标。
Border irrigation current advancement process model plays an important role to determine irrigation technical index, average field infiltration rate and roughness coefficient.
畦灌水流推进过程计算模型对确定灌水技术要素、田间平均入渗率和糙率有十分重要的作用。
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